Elf symbol collision checker

symbol-compare.bash

#!/bin/bash

EXCLUSION_LIST="^__ ^[a-z] _ITM_deregisterTMCloneTable _ITM_registerTMCloneTable _Jv_RegisterClasses .*__cxx1112basic.* _edata _end _fini _init _Unwind_Resume _ZdlPv _Znwm ^_ZdaPv ^_Znam ^_ZSt.* ^_ZNSt. ^_ZNKSt.* ^_ZNSo.* ^_ZTVN10.* ^_ZTISt.* ^_ZTSSt.* ^_ZNSt8ios.* ^_ZNKSt5ctype.* "

if [[ $# -lt 2 ]]; then
  echo "Usage: $0 lib1.so lib2.so"
  exit 1
fi

LIB1_LIB_FILE=$1
LIB2_LIB_FILE=$2

LIB1_SYMBOL_FILE=$(mktemp)
LIB2_SYMBOL_FILE=$(mktemp)

generate_symbol_list()
{
  local LIB_FILE=${1} LIB_SYMBOL_FILE=${2}

  nm -D ${LIB_FILE} | awk 'NF>1{print $NF}' | sort   > ${LIB_SYMBOL_FILE}

  for s in ${EXCLUSION_LIST}; do
      sed -i -e "/${s}/d" ${LIB_SYMBOL_FILE}
  done
}

generate_symbol_list ${LIB1_LIB_FILE} ${LIB1_SYMBOL_FILE}
generate_symbol_list ${LIB2_LIB_FILE} ${LIB2_SYMBOL_FILE}

LIST_OF_COMMON_SYMBOLS=$(comm -12 ${LIB1_SYMBOL_FILE} ${LIB2_SYMBOL_FILE})
COUNT_OF_COMMON_SYMBOLS=$(echo "$LIST_OF_COMMON_SYMBOLS" | wc -l)

# wc is listing an empty line as 1
[[ -z ${LIST_OF_COMMON_SYMBOLS} ]] && COUNT_OF_COMMON_SYMBOLS=0

echo "Summary of common symbols found: "
echo " - Lib1: ${LIB1_LIB_FILE} "
echo " - Lib2: ${LIB2_LIB_FILE} "
echo ""
echo " * common symbols found: ${COUNT_OF_COMMON_SYMBOLS}"

if [[ -n ${LIST_OF_COMMON_SYMBOLS} ]]; then
  echo ""
  echo "Pulse a key to display the common symbols found"
  read
  echo "${LIST_OF_COMMON_SYMBOLS}"
fi